Is an electronic signature legally valid?

In many places, yes. Laws like the US ESIGN Act and the EU's eIDAS focus on intent and attribution rather than how the mark looks. For high-stakes agreements, check the rules that apply to you.

Does the document get uploaded to add the signature?

No. pdf-lib bakes the drawn, typed or dropped-in signature into the page in this tab, and the signed file downloads straight from your device.

Sign PDF

No upload · runs in your browser

Drop a PDF to signOpens in the editor. Add a signature and save, nothing is uploadedSelect PDF No upload · processed locally · auto-deleted

How it works

How to sign a PDF without uploading it

Drop a PDF, add your signature in the editor by drawing, typing or placing an image, then save. The signed document downloads straight from your browser.

Because nothing is uploaded, contracts and agreements stay on your machine. There is no account to create and no server in the loop.

FAQ

Open your PDF, choose the signature tool in the editor, and draw, type, or drop in a signature image. Place it where you want, then save the signed PDF.

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